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Makergear M2: Repositioned Filament Drive Gear

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AFAICT, the Makergear M2’s filament drive gear has been in the same place on the motor shaft since I set it up nearly five years ago:

Makergear M2 - original filament drive pulley position
Makergear M2 – original filament drive pulley position

The filament rides along the white trail close to the front of the gear. This worked fine with PETG, but TPU occasionally squeezed out through the small gap toward the front of the extruder, so I moved the gear a few millimeters forward:

Makergear M2 - improved filament drive pulley position
Makergear M2 – improved filament drive pulley position

The track on the idler bearing shows the filament is neatly centered where it should be:

Makergear M2 - filament idler bearing position
Makergear M2 – filament idler bearing position

I haven’t adjusted the spring pressure on the idler, but it’s probably too high for TPU. If it continues to work, I’ll continue to do nothing.

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